This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI63X75N, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI63 Standard Cylinder SI63X75N
The AirTAC SI63 Standard Cylinder SI63X75N is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø63mm bore and 75mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI63X75N, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ63 mm
- Stroke75 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAI63X75N
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI63 Standard Cylinder SI63X75N
The AirTAC SI63X75N is a discontinued double-acting ISO 15552 profile cylinder with a 63 mm bore and 75 mm stroke. It delivers 1559 N push and 1402 N pull at 0.5 MPa via a G3/8 port. The direct replacement is the SAI63X75N, matching the interface, force and mounting exactly.
The SAI upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and long life. This NBR-sealed unit operates from -20 to +70 C, with a Viton H option for high heat. Note this SKU lacks a magnet, so it cannot accept CS1-B/DS1-B sensors.
Airtac SI63 Standard Cylinder SI63X75N Technical Specifications
| Model | Airtac SI63 Standard Cylinder SI63X75N |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI63X75N |
| Bore size | Ø63 mm |
| Stroke | 75 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI63X75N carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
The SAI63X75N produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI63 Standard Cylinder SI63X75N
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 63 | Bore size in mm. |
| ×75 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI63 Standard Cylinder SI63X75N Is Used
Mid-Tonnage Clamping
Generates 1559 N of push force at 0.5 MPa, ideal for securing heavy workpieces during machining or welding operations.
Package Diversion
Provides robust actuation for routing heavier goods or pallets on automated material handling lines.
Replacing the Airtac SI63 Standard Cylinder SI63X75N with the SAI63X75N
To replace the SI63X75N, order the SAI63X75N. Verify the ISO 15552 mounting interface, 75 mm stroke, G3/8 port (PT/G/NPT) and your NBR seal choice. Because this specific SKU lacks the -S magnet, it cannot support position sensing; if switches are needed, specify the SAI63X75NS. Sizing both ways: the 63 mm bore yields 1559 N push at 0.5 MPa, while the neighbouring 50 mm bore offers 982 N. For load holding on air loss, note the cushion only decelerates; use an external pilot check valve or the SAIL/BSAI lock variants. At 75 mm stroke, side-load risks are minimal.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI63X75N
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI63 Standard Cylinder SI63X75N FAQ
Yes, the SI63X75N is discontinued. The direct replacement is the AirTAC SAI63X75N. It is dimensionally interchangeable per ISO 15552, retaining the same 63 mm bore, 75 mm stroke, output force, G3/8 port and mounting fixtures.
This double-acting cylinder uses a G3/8 air port. It delivers 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push at 0.7 MPa, 2805 N push at 0.9 MPa, and a theoretical maximum of 318 kgf at 1.0 MPa.
Request a Quote for the SAI63X75N
Send us the quantity and destination. We confirm price, stock and lead time on the SAI63X75N replacement — usually within 7-8 hours.